Number of items, by item type and grade, mathematics national main assessment (accommodations permitted [R3]): 2000

Grade

Multiple-choice items

Dichotomous constructed-response items

Polytomous constructed-response items

4

85

27

33

8

106

31

31

12

104

30

34

SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2000 Mathematics Assessment.

Average percentage missing, by item type and grade, mathematics national main assessment (accommodations permitted [R3]): 2000

Grade

Statistic

Multiple-choice items

Dichotomous constructed-response items

Polytomous constructed-response items

4

Average percentage missing

3.49

6.99

12.03

Minimum

0.80

1.65

2.30

Maximum

16.25

20.17

47.07

8

Average percentage missing

4.42

6.13

12.09

Minimum

0.36

1.49

2.60

Maximum

29.24

16.78

37.22

12

Average percentage missing

4.92

15.56

19.06

Minimum

0.90

1.65

1.83

Maximum

42.36

49.42

53.85

NOTE: Missing responses includes the categories "omitted" and "not-reached".
SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2000 Mathematics Assessment.

Average percentage off-task, by item type and grade, mathematics national main assessment (accommodations permitted [R3]): 2000

Grade

Statistic

Dichotomous constructed-response items

Polytomous constructed-response items

4

Average percentage off-task

0.24

0.16

Minimum

0.00

0.00

Maximum

2.18

0.64

8

Average percentage off-task

0.19

0.22

Minimum

0.00

0.00

Maximum

1.05

0.76

12

Average percentage off-task

0.88

0.86

Minimum

0.00

0.16

Maximum

7.17

2.28

NOTE: An "off-task" response (constructed-response items only) is a response that is unrelated to the question and is considered inappropriate.
SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2000 Mathematics Assessment.